Other Chemistry · JEE Main previous year questions

2005 13 questions

1. Q1552005 · 28 Apr 2005 · Shift 1

   Which of the following oxides is amphoteric in character?

   1. A.$\mathrm{CaO}$
   2. B.${\mathrm{CO}}_2$
   3. C.${\mathrm{SiO}}_2$
   4. D.${\mathrm{SnO}}_2$
   Show answer

   Answer: D

2. Q1562005 · 28 Apr 2005 · Shift 1

   In which of the following arrangements the order is NOT according to the property indicated against it?

   1. A.$\mathrm{Li}<\mathrm{Na}<\mathrm{K}<\mathrm{Rb}$ Increasing metallic radius
   2. B.$\mathrm{I}<\mathrm{Br}<\mathrm{F}<\mathrm{Cl}$ Increasing electron gain enthalpy (with negative sign)
   3. C.$\mathrm{B}<\mathrm{C}<\mathrm{N}<\mathrm{O}$ Increasing first ionization enthalpy
   4. D.$\mathrm{A}{\mathrm{l}}^{3+}<\mathrm{M}{\mathrm{g}}^{2+}<\mathrm{N}{\mathrm{a}}^{+}<{\mathrm{F}}^{-}$ Increasing ionic size
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   Answer: C

3. Q1712005 · 28 Apr 2005 · Shift 1

   Reaction of one molecule of $\mathrm{HBr}$ with one molecule of 1,3-butadiene at $40^{\circ }\mathrm{C}$ gives predominantly

   1. A.3-bromobutene under kinetically controlled conditions
   2. B.1-bromo-2-butene under thermodynamically controlled conditions
   3. C.3-bromobutene under thermodynamically controlled conditions
   4. D.1-bromo-2-butene under kinetically controlled conditions
   Show answer

   Answer: B

4. Q1762005 · 28 Apr 2005 · Shift 1

   Equimolar solutions in the same solvent have

   1. A.Same boiling point but different freezing point
   2. B.Same freezing point but different boiling point
   3. C.Same boiling and same freezing points
   4. D.Different boiling and different freezing points
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   Answer: C

5. Q1812005 · 28 Apr 2005 · Shift 1

   Hydrogen bomb is based on the principle of

   1. A.Nuclear fission
   2. B.Natural radioactivity
   3. C.Nuclear fusion
   4. D.Artificial radioactivity
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   Answer: C

6. Q1822005 · 28 Apr 2005 · Shift 1

   A reaction involving two different reactants can never be

   1. A.Unimolecular reaction
   2. B.First order reaction
   3. C.second order reaction
   4. D.Bimolecular reaction
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   Answer: A

7. Q1992005 · 28 Apr 2005 · Shift 1

   Amongst the following the most basic compound is

   1. A.benzylamine
   2. B.aniline
   3. C.acetanilide
   4. D.p-nitroaniline
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   Answer: A

8. Q2032005 · 28 Apr 2005 · Shift 1
   
   1. A.$OCOR$
   2. B.$O{C}_2{H}_5$
   3. C.$N{H}_2$
   4. D.$Cl$
   Show answer

   Answer: D

9. Q2042005 · 28 Apr 2005 · Shift 1
   
   1. A.highly spontaneous at ordinary temperature
   2. B.one with negligible enthalpy change
   3. C.endothermic
   4. D.exothermic
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   Answer: D

10. Q2072005 · 28 Apr 2005 · Shift 1

    Calomel ($H{g}_{2}C{l}_2$) on reaction with ammonium hydroxide gives :

    1. A.$HgO$
    2. B.$H{g}_{2}O$
    3. C.$N{H}_2-Hg-Hg-Cl$
    4. D.$HgN{H}_{2}Cl$
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    Answer: D

11. Q2112005 · 28 Apr 2005 · Shift 1

    Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

    1. A.The most probable speed increases
    2. B.The fraction of the molecules with the most probable speed increases
    3. C.The distribution becomes broader
    4. D.The area under the distribution curve remains the same as under the lower temperature
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    Answer: B

12. Q2132005 · 28 Apr 2005 · Shift 1

    Which of the following statements in relation to the hydrogen atom is correct?

    1. A.3s orbital is lower in energy than 3p orbital
    2. B.3p orbital is lower in energy than 3d orbital
    3. C.3s and 3p orbitals are of lower energy than 3d orbital
    4. D.3s, 3p and 3d orbitals all have the same energy
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    Answer: D

13. Q2262005 · 28 Apr 2005 · Shift 1

    On heating mixture of $C{u}_{2}O$ and $C{u}_{2}S$ will give :

    1. A.$C{u}_{2}S{O}_3$
    2. B.$CuO+CuS$
    3. C.$Cu+S{O}_3$
    4. D.$Cu+S{O}_2$
    Show answer

    Answer: D